Double-A Reading manager Dusty Wathan said some of Simon's difficulties this season are due to the slider he is working on developing, CSNPhilly.com reports. “The slider is still a work in progress,” Wathan said. “We force him to throw it. He’s going to have to end up throwing it. If we lose a game because of it, so be it. If we get to watch him in a couple years strike guys out in Philadelphia with that slider, then it'll all be worth it.”